If the instantaneous current in a circuit is given by `I=2 cos (omegat+phi)` amperes, the rms value of the current is
A. 2A
B. `sqrt(2)A`
C. `2sqrt(2)A`
D. 0A

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1 Answers

Correct Answer - B
`I_(rms)=(I_(o))/(sqrt(2))=(2)/(sqrt(2))=sqrt(2)A`

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